Steam boiler



Dec. 31, 1929. A. H. KEMPER ET AL STEAM BOILER Filed April 22, 1927Patented Dec. 31, 1929 UNITED STATES PATENT OFFICE ALBERT I-I. KEMPERAND WILLIAM H. DURKIN, OF DAYTON, OHIO STEAM BOILER Application filedApril 22,

This invention relates to improvements in steam boilers, havingparticular reference to vertical, flueless boilers of the type set forthin our copending application for patent Serial No. 98,04A, filed March27, 1926.

In the accompanying drawings which serve for illustrating the invention:

Fig. 1 is a view in elevation of the boiler;

Fig. 2 is a view in Vertical section.

In vertical flueless boilers of the type here shown, there is a directconnection between the fire box and the smoke pipe which results inexcessive heating of the pipe and abnormal loss of heat through thepipe. Various forms of dampers and other regulating devices and specialconnections have been employed heretofore for overcoming theseconditions. Such arrangements, however, while reasonably effective,require more or 2c less regulation with the result that, if theadjustments are not promptly made as re quired for normal regulation ofthe heat, the best results are not obtained.

The invention of the present application provides simple, effectivemeans for overcoming these conditions, consisting in a smoke conduit 1connected to the smoke outlet 2, and wound around the boiler spirally,as here shown, upward to the smoke pipe 3, the walls of the conduitbeing formed of light boiler plate, or heavier sheet metal than thesmoke pipe.

By this arrangement a substantial area of the boiler casing is coveredby the conduit which acts to conserve the heat in the boiler byminimizing radiation of heat from the covered area, and further byreaction of the heat passing through the conduit and by minimizing theheat passing through the smoke pipe.

It has been demonstrated by the limited use made of the invention, thus,far, that more uniform temperature of the boiler results and thatsubstantially less fuel is required for generating and maintaining agiven head of steam.

For heavy duty boilers a steam pressure line 4 may be connected as shownin the drawings for effecting forced draft through the smoke conduit andpipe.

1927. Serial No. 185,819.

tures.

ALBERT H. KEMPER. WILLIAM H. DURKIN.

